- Author: Robert Allen
- Language: English
- Year: 2013
- Author: Robert Allen Carlton (auth.)
- Language: English
- Year: 2011
- Author: Robert Allen Rutland
- Language: English
- Year: 2000
- Author: Robert Allen Carlton
- Language: English
- Year: 2011
- Author: Robert Allen Gable
- Language: English
- Year: 1999
- Author: Robert Allen Rutland
- Language: English
- Year: 1995
- Author: Robert Allen Carlton (auth.)
- Language: English
- Year: 2011
- Author: Robert Allen Meyers
- Language: English
- Year: 2005
- Author: Robert Allen Meyers
- Language: English
- Year: 2001